osmo-nitb: generate coredump and exit upon SIGABRT received

Previous code relied on abort() switching sigaction to SIG_FDL +
retriggering SIGABRT in case the signal handler returns, which would
then generate the coredump + terminate the process.
However, if a SIGABRT is received from somewhere else (kill -SIGABRT),
then the process would print the talloc report and continue running,
which is not desired.

Change-Id: I3371783e04c7bce12d11d6f9cc7021bf290489ea
Fixes: OS#4865
1 file changed
tree: 7b2809f512893ba0040493d579cbf028dbffb7f8
  1. contrib/
  2. debian/
  3. manuals/
  4. openbsc/
  5. .gitignore
  6. .gitreview
  7. .mailmap